They aren't ignoring reality at all. Even as they cry about their kids being "exposed," they're going to turn around & teach them all about how "gays are evil & these are the sick things that they do." They just don't want anyone teaching acceptance, but that makes them sound like a roving gang of douchehats, so they try to frame it as "inappropriate for the age level." Because the guy screaming about fag drags is easy to dismiss, but if they can make an argument that looks sensible, people might be unwilling or unable to do that extra bit of research & logic to expose the steaming core of bullshit.